Lorentzen & Wettre ScanPro SA 150 is a high‑current industrial power supply used to drive motor control or monitoring systems in paper and pulp processing equipment. Common failure modes for this unit include degraded output voltage due to aging electrolytic capacitors, overheating of the internal switching regulator, and failure of the main transformer windings under load spikes. First‑check diagnostics: verify input mains voltage and polarity; measure output rails with a calibrated multimeter while the unit is powered on; inspect the PCB for burnt or swollen components and check the thermal paste on the heat sink. If output voltages are out of spec, replace electrolytics and reflow any damaged solder joints before proceeding to component‑level testing.[oss-gpt-20b]